Abstract: An improved gun lock for permitting a gun, particularly a shotgun, to be positioned within the passenger compartment of a vehicle, specifically a law enforcement vehicle. The gun lock includes a protective closable housing which surrounds the barrel and trigger mechanism of the gun for preventing unauthorized access to same. The housing has a cover which is spring urged into an open position. The cover is normally maintained in a closed position by a locking device which can be electrically actuated to release the cover only when the vehicle ignition switch is in the "on" or "accessory" positions. Upon release of the lock device, the spring automatically opens the cover, so that the shotgun is accessible only to those authorized persons having the vehicle ignition key.